Extension-table



F. WOHLMANN.

EXTENSION TABLE. APPLICATION FILED ocT. 2s, 191s. IIENEWED IUNEIQ, 1920.

Patented Aug. 31, 1920.

2 SHEETS-SHEET l.

I 4 IIIsN QN L @INIT l A TTURNEY F. WOHLNIANN.

EXTENSION TABLE.

' APPLICAT'IQN FILED ocT. 26. 1916. RENEwED JUNE 9,1920.

1,35 1 ,457 Pateted Aug. 31, 1920.

2 SHEETS-SHEET 2.

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A TTOH/VEV UNITED STATES PATENT OFFICE.

" FRIEDRICH WOHLMANN, OF LOS ANGELES, CALIFORNIA.

EXTENSIONJTABLE.

i Specification of Letters Patent. Patented Allg. 31, 1920.

Application -led October 26, 1916, Serial No. 127,936. Renewed June 9, 1920. Serial No. 387,722.

To all whom t may concern.'

Be it known that I, FRIEDRICH WoHL- MANN, a subject of the Emperor of Germany, residin in the cit and county of Los Angeles, tate ofalifornia, have invented certain new and useful Improvements in Extension-Tables, of which the following is a specification.

My invention relates to an extension table of the type in which one or more leaves are housed beneath the top of the table and arranged to be drawn from their housed position and moved into a position to'form a continuation of the top.

The primary object of the invention is to provide a simple form of extension table including a fixed top portion and supplemental top portions or leaves which can be easily and quickly moved to and from their housed position with a straight push or pull requiring merely a minimum effort and which leaves can be held automatically braced in extended position simply by moving the same into extended position and without the necessity of actuating any hold' ing means.

Various other objects and advantages of the invention will be in part obvious from an inspection of the accompanying drawings and in part will be more fully set forth in the following particular description of one form of mechanism embodying my invention, and the invention also consists in certain new and novel features Vof construction and combination of parts hereinafter set forth and claimed.

In the accompanying drawings:

Figure 1 is a longitudinal sectional view showing a preferred embodiment of my invention with the leaves and carriages in housed position and taken on the line 1--1 of Fig. 3 looking in the direction indicated by the arrows;

Fig. 2 is an enlarged view of the left side of the device shown in Fig. 1 with one of the carriages and its leaf in extended position;

Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 1; and

Fig. 4 is a view showing the underside of thetable with one of the leaves in engagement with the table top.

In the drawings, there is shown what may fbe regarded as a conventional form of table formed of a rectangular frame supported on legs 5 and including side sills 6, end sills 7 and a top 8 fixed thereto as is usual with devices of this character. Extending transversely across the underside of the top and fixed centrally thereto is a stop strip 9. The form of the device illustrated includes two leaf-supporting carriages, designed to be extended -longitudinally from the opposite sides of this stop strip, but las these devices are similar in construction and operation the detailed description of either one will be sufficient for the other. i

The Aside sills are connected below each of the outer edges of the stop strip by a carriage-'supporting-member 10 in the form of aboard disposed vertically, the upper side of which is cut to provide a pair of step portions 11 and 12 (see Fig. 3), designed to support respectively the carriages 13 and 14 when in housed position as shown in Fig. l. The carriages are similar in construction and each includes a pair of longitudinally eX- ten'dingrunners 15 and 16, connected by a -pair of longitudinally spaced and transversely extending struts 17 inthe form of flat pieces fixed to the runners adjacent their `upper edges as shown more particularly in Fig. 2. This arrangement of transverse struts permits one of the carriages to telescope within the other as shown in Fig. 3, incidentally providing a construction which ,offers the minimum obstacle to the positioning of drawers within the table or otherwise utilizinor the open space beneath the table top. Tzlie top of the runners have a straight edge 18 designed to engage the underside of the top over a. material area so as to brace the cantaliver construction formed by the carriage when in extended position. The inner end of each of the runners is'inclined as shown at 19 and provided with a shoulder` notch 2O adapted to engage and underlap the stop stri 9 when the carriage is in extended position to thus prevent the carriage from accidentally sliding inward when the leaf hereinafter described is moved into engavement with'the fixed top.

pposite sides of each of the .transverse sills are recessed to provide runways 21 for the runners. The underside of the runners are designed so that when drawn across the runway 21 the carriage will be moved verti-l cally so as to bring the leaf 22, supported thereby, up onto a level with the top 8. For this purpose the underside of the runners are each provided withan angled incline 23 arranged so that when the runner has moved into housed position a distance sufficient to permit the leaf to clear the top 8, the incline 23 comes into engagement with the runway 21 and a. further continued movement of the runners of the carriage across the runway causes the same to be elevated to bring the leaf on a level with the fixed table top, (see Fig. 2). The incline 23 terminates in a stop 24: adapted to engage against the inside of the end sill to limit any further outward movement of the carriage. The leaf 22 is slidably mounted upon the carriage and is guided for movement to and from the top. The leaf is fastened to the carriage and held against vertical movement relative thereto by means of L-irons 25 fastened to the underside of the leaf and vhaving a projecting flange slidably mounted in grooves 26 on the inner faces of the runner, as shown more particularly in Fig. 3. The runners are also provided with beveled edge stops 27 so positioned that when the leaf is in abutting engagement with the top, one of the angle irons 25 will have passed over the stops thereby locking the leaf in engagement with the top.

In operation, and assuming that the carriages and leaves are in the housed positions shown in Fig. l either one or both of the carriages may be drawn from their housed positions lengthwise of the table simply by pulling on the leaf to be used. This action will cause the carriage with the leaf de` pressed below the level of the top to be moved outwardly from the frame and when approaching the end of its run the incline will cause the carriage to elevate the leaf until it is level with the top in which position the inner end of the withdrawn carriage will be in engagement with the stop strip. The extended leaf is then pushed back into engagement with the top, the angle irons passing over the clips to lock the leaves into position.

In order to telescope the carriage and its leaves into housed position beneath the fixed top, the leaf to be housed is raised slightly so that the angle irons will clear the stops and the leaf is then drawn out into the osition shown in Fig. 2, a distance su cient to clear the top. In this position the iron 25 is disposed in the recess 28 -thus holding the leaf to the carriage and permitting the carriage to be moved back into telescoped position when pressure is applied to the outer edge of the leaf. At this time the outer end of the carriage is lifted slightly so that the inner end will clear the stop piece and then the carriaige and its leaf is moved back into the position shown in Fig. 1 and the table is then in its original normal position and in this position resembles the lconventional form of table now in general use. y

. Bymeans of a device of this character there is attainedan ease of operatiomthe frictional contact between parts having been reduced to a minimum. In either collapsed or extendedposition, the parts are firmly braced against any tilting movement. One of the elements of the device disclosed is simplicity of parts and ease of operation. The device may readily be installed in any Conventional form of table, merely by properly recessing the end sills vand mounting the carriage and its leaves in position on such modified conventional form of table. The appearance of the table is preserved, it being possible by means of the construction illustrated, to use the leaves of the same width as the stationary top andthe depths of the structural parts is but slightly increased to accommodate the housed extensions.

Having thus described my invention, I claim:

1. In an extension table, a frame provided with supporting legs and including a fixed top, a stop strip fixed to the underside of said fixed top and a transverse member recessed to provide a runway, a carriage slidably mounted in'said runway movable to and from a position stored beneath the fixed top, and provided with an inclined underside designed to elevate the carriage when drawn along said runway from its stored position and a leaf slidably mounted on said carriage and arranged when the carriage is extended to be moved horizontally into engagement flush with the top surface of said fixed top, said carriage provided with means for engaging said stop strip to hold the same while the leaf is being moved into engagement with the fixed top.

2. In an extension table, a frame provided with supporting legs and including a fixed top, a stop strip fixed to the underside of said fixed top and a pair of transverse members each designed to constitute a carriage support, a pair of carriages each provided with a sliding leaf mounted thereon and each movable to and from a position stored beneath the fixed top, said carriages being movable across said supports, and each provided with an inclined underside for engaging the supports to elevate the carriages-when the leaves carried thereby have cleared the fixed top, said carriages including longitudinal members with' the members of one carriage telescoping within the members of the other carriages when in stored position and the telescoped carriage being slightly depressed to provide clearance for the other carriage.

3. In an extension table, a frame provided with supporting legs and including a fixed top, of. a leaf ysupporting carriage slidably mounted in the frame and movable to and from a position stored beneath the fixed top, a leaf slidably mounted on said carriage and fixed thereto against vertical movement,

. mounted in the frame and movable to and from a position stored beneath the fixed top, a leaf slidably mounted on said carriage and fixed thereto against vertical movement, said carriage provided With guiding means for causin said leaf to remain depressed below the xed top until it has cleared said top when drawn from its stored position and then elevated to the level of said fixed top and means for holding said carriage while permitting independent sliding movement of the leaf horizontally into engagement with the fixed top.

5. In an extension table, the combination with a frame including a fixed top and a stop strip, of a carriage slidably mounted in said frame and adapted When in extended position to abut against said strip, a leaf slidably mounted on said carriage and means for elevating the carria e to brin the leaf offset from and level Wit said fixe top, said leaf being slidable on the carriage in a direction toward the stop strip and into engagement with the fixed top, said stop strip acting to prevent accidental collapsing of the carriage when the leaf is moved into engagement with the fixed top.

6. In an extension table, the combination with a frame includin a fixed top, of a carriage slidably mounted in said frame, a leaf slidably mounted on said carriage, guiding means forcausing said carriage'to remain depressed below the fixed to until it has cleared said top when drawn rom its stored position and for then elevating the carriage to bring the leaf offset from and level with said fixed top, said leaf being slidable on the carriage into engagement with the fixed top and means for holding the inner end of the carriage locked in elevated position.

7 In an extension table, the combination with a frame including a fixed top, of a carriage slidably mounted in said frame and adapted to be telescoped into the frame, said carriage having a leaf guideway, a leaf Slidably mounted 1n said guideway, the underside of said carriage provided with an ncline so positioned as to cause the carriage to move verticallyI after it has cleared said top as it is moved from the frame.

8. In an extension table, the combination with a frame including a fixed top, of a carriage slidably mounted in said frame and adapted to be telescoped into the frame, said carriage having a leaf guideway, a leaf slidably mounted in said guideway to and from the fixed top, the underside of said carriage provided with an incline causing the carriage to move vertically as itis moved from and into the frame, and means for bracing the carriage from the frame when in extended position drawn from the frame.

Signed at New York city in the county of New York and State of New York this twenty-fourth da of October A. I). 1916.

ERIE RICH WoiILMANN. 

